Poker?

I got an invitation to join this site that hosts poker. I must be the dumbest person not to know how this game is played, but to be honest, I really don't know of any gambling games so that makes me weird to some who are into this kind of "recreation" or preoccupation. I am so sorry that I should be the last person you should ask about gambling.MInd you, I am not saying this with a poker face.